{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["enabling technology", "process parameter", "engineering feature", "manufacturing standard", "biomedical", "application"], "input": "Rapid prototyping techniques are classified in two categories : subtractive , and additive ."}
{"enabling technology": ["Rapid prototyping"], "process parameter": [], "engineering feature": [], "manufacturing standard": [], "biomedical": [], "application": []}